Type of Article:  Case Report

Volume 7; Issue 2.2 (May 2019)

Page No.: 6565-6570

DOI: https://dx.doi.org/10.16965/ijar.2019.168


Suma H Y 1, Yogesh A S 1, Shanthini S 2.

1 Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India.

2 Sri Lakshmi Narayana Institute of Medical Sciences, Puducherry, India.

Corresponding author: Dr. Suma H Y, Additional Professor, Department of Anatomy, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India Phone- 9442550603; E-Mail: suma1478@gmail.com


Ansa cervicalis is a nerve loop that is embedded in the anterior wall of carotid sheath of the neck. It is formed by descendent hypoglossi and descendens cervicalis. It supplies the infrahyoid muscles. During routine dissection, a rare variant in the morphology of Ansa cervicalis was observed in adult male cadaver. The variant ansa cervicalis exhibited two loops, and was present bilaterally. The formation, course and relations of the nerve loop is complex. During literature search, we came across studies which propose different classifications. Hence we have added a note on the different classifications.

Ansa cervicalis is important since it can be used in nerve-nerve anastomosis, nerve-muscle pedicle implantation in relation to reconstructive surgeries of larynx. Hence, the knowledge of variations in the formation, and distribution is relevant. It can affect the outcome during reinnervation surgeries following recurrent laryngeal paralysis and surgeries around this area of neck.

Key words: Ansa Cervicalis, Cervical Plexus, Reinnervation Of Larynx, Infrahyoid Muscles, Recurrent Laryngeal Nerve Paralysis.


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Cite this article: Suma H Y, Yogesh A S, Shanthini S. A RARE CASE OF BILATERAL VARIANT ANSA CERVICALIS AND REVIEW OF LITERATURE. Int J Anat Res 2019;7(2.2):6565-6570. DOI: 10.16965/ijar.2019.168